Sony a7 and a7r Low light ISO test

I have had quite a few people ask how the a7r performs in low light compared to the a7. I took both cameras, put a Canon 135mm T2.2 Cine lens with Metabones Mk III EF adaptor on the front and started testing. All was shot at 25p at 1/50th second at 800, 1600, 3200, 6400, 12800, 25600 ISO increments with f stops of 2.5, 3.5, 5.6, 8, 10 and 13 respectively.

Both cameras were set on Incandescent White Balance, DRO was set to off and they were both on Standard Picture Profiles.